As you suspected not going to be easy with out modification. I personally modified a Craftsman 46" 2 stage unit to fit onto my LGT 165. It wasn't that bad getting to attach to my tractor . The drive to the blower was the tricky part.
Post a few pics of the blower and we can see if it may be easy or not to attach.

Welcome to the forum. I edited the title to maybe get more folks into this. Anything can be adapted, just depends on whether the effort is worth it in the long run. Get some pics posted for us to see what you have. Pic help is in the link at the bottom of this post.

hey vineyard45 welcome to GT Talk! hows the tractor? were you able to mow the lawn with it? Tom

She's running fine. Sharpening the blades and greasing the stearing/wheels made a big difference. Got the lights going also. 7 out of 10 she starts right up, but the other 3 i have to jump the selinode. The seat adjustment slide is jamed in the foward position, still trying to work that one out without breaking anything. My kids love driving it. Tinkering with these old machines is as much fun as driving them. Very happy with it. Thanks Tom

Here's what I did on my 125. I had same issue. I think it's wired wrong. I bought a new solenoid from NAPA, just under $20, I followed their wiring direction and it's on the wrong pole. My finger ( first pic) points to the opposite side than where yours is. I also lost the extra ground wire. I'm not sure if the old one will work that way, but the new one did. Try it before buying a new one. 2nd pic is part #
Good luck , Tom.